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  <title>Document</title>
</head>
<body>
  <div class="box">
    <h1 id="title">冲啊！！！！！！</h1>
  </div>
  <script>
    const boxDom = document.querySelector('.box');
    const hDom = document.getElementById('title');
    const hDom2 = document.querySelector('#title');
    console.log(boxDom, hDom, hDom2, hDom === hDom2); // true
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